Hi there,
Post installation of this update - "2022-12 Cumulative Update for Windows Server 2016 for x64-based Systems (KB5021235)" on one of the domain controllers in Azure VM. We started facing a weird RDP Authentication issue where users with even the correct credential failed to take an RDP session of remote systems in another network(site).
After investigating further, We noticed the below warning message in the event log for RDP Service-
RDPClient_SSL: An error was encountered when transitioning from TsSslStateHandshakeInProgress to TsSslStateDisconnecting in response to TsSslEventHandshakeContinueFailed (error code 0x80004005).
In the end, we had to uninstall this CU Update - KB5021235 from the domain controller which has fixed the issue.
So if you're having a similar issue, I request you to please try uninstalling this update or hold for installation.
Hopefully, the Microsoft update team will fix this issue very soon.
Thank you,
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